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On Abel's Concept of Doubt and Pessimism

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Author Info
Elyès Jouini () (CEREMADE - CEntre de REcherches en MAthématiques de la DEcision - CNRS : UMR7534 - Université Paris Dauphine - Paris IX)
Clotilde Napp (DRM - Dauphine Recherches en Management - CNRS : UMR7088 - Université Paris Dauphine - Paris IX)

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Abstract

In this paper, we characterize subjective probability beliefs leading to a higher equilibrium market price of risk. We establish that Abel's result on the impact of doubt on the risk premium is not correct (see Abel, A., 2002. An exploration of the effects of pessimism and doubt on asset returns. Journal of Economic Dynamics and Control, 26, 1075-1092). We introduce, on the set of subjective probability beliefs, market price of risk dominance concepts and we relate them to well known dominance concepts used for comparative statics in portfolio choice analysis. In particular, the necessary first order conditions on subjective probability beliefs in order to increase the market price of risk for all nondecreasing utility functions appear as equivalent to the monotone likelihood ratio property.

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Paper provided by HAL in its series Working Papers with number halshs-00176611_v1.

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Date of creation: 2006
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Handle: RePEc:hal:wpaper:halshs-00176611_v1

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Related research
Keywords: Pessimism; optimism; doubt; stochastic dominance; risk premium; market price of risk; riskiness; portfolio dominance; monotone likelihood ratio;

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  1. Elyès Jouini & Clotilde Napp, 2006. "Heterogeneous Beliefs and Asset Pricing in Discrete Time: An Analysis of Pessimism and Doubt," Post-Print halshs-00176500_v1, HAL. [Downloadable!]
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  2. Diego Nocetti & Elyès Jouini & Clotilde Napp, 2008. "Properties of the Social Discount Rate in a Benthamite Framework with Heterogeneous Degrees of Impatience," Post-Print halshs-00365980_v1, HAL. [Downloadable!]
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This page was last updated on 2009-11-28.

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